The West Seattle Bridge itself will remain open, but certain on- and off-ramps will be closed at times this Saturday morning because of drainage work. Here’s the full announcement from the city:

Drain Maintenance to Close Some Ramps to West Seattle Bridge

Seattle Public Utilities (SPU) will be doing routine maintenance and cleaning of storm drains along the West Seattle Bridge. As a result, some entrances and exits will be closed to traffic on Saturday, October 27. Ramp closures will begin at 1 a.m. Saturday, and continue until approximately 10 a.m.

The following West Seattle Bridge on ramps and off ramps will be closed for drain cleaning:

Eastbound

On ramp at Delridge Way SW
Off ramp to 1st Avenue

Westbound

On ramp at 1st Avenue
Off ramp to Harbor Ave SW
Off ramp to Delridge Way SW
Off ramp to SW Admiral Way
Off ramp to SW Avalon Way
On ramp to West Seattle Bridge from southbound Highway 99

The West Seattle Bridge high rise in both directions will remain open between West Seattle and Interstate 5. Measures will be taken to allow transit through work zones.